Potato Onions from Southern Exposure Seed Exchange

I had placed my order back in the Spring for some potato (multiplier) onions.  They arrived today & I will be planting them in a few weeks.  I have never grown them before, so I will stagger the plantings every 2 weeks & label them to see what works best since I've heard times from Sept 15 til the week of Thanksgiving.   I'll save a few of them to start in the Spring.  I ordered them from Southern Exposure Seed Exchange.